Measurement of magnetic penetration depth and superconducting energy gap in very thin epitaxial NbN films (Articolo in rivista)

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  • Measurement of magnetic penetration depth and superconducting energy gap in very thin epitaxial NbN films (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.3314308 (literal)
Alternative label
  • Anand Kamlapure (1); Mintu Mondal (1); Madhavi Chand (1); Archana Mishra (1,2); John Jesudasan (1); Vivas Bagwe (1); Lara Benfatto (3); Vikram Tripathi (1); Pratap Raychaudhuri (1) (2010)
    Measurement of magnetic penetration depth and superconducting energy gap in very thin epitaxial NbN films
    in Applied physics letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Anand Kamlapure (1); Mintu Mondal (1); Madhavi Chand (1); Archana Mishra (1,2); John Jesudasan (1); Vivas Bagwe (1); Lara Benfatto (3); Vikram Tripathi (1); Pratap Raychaudhuri (1) (literal)
Pagina inizio
  • 072509 (literal)
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  • http://dx.doi.org/10.1063/1.3314308 (literal)
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  • 96 (literal)
Rivista
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  • American Institute of Physics. (literal)
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  • 3 (literal)
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • (1) Tata Institute of Fundamental Research, Homi Bhabha Rd., Colaba, Mumbai 400005, India (2) IIC, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India (3) INFM-CNR Statistical Mechanics and Complexity Center, University of Rome \"La Sapienza,\" P.le A. Moro 5, 00185 Rome, Italy (literal)
Titolo
  • Measurement of magnetic penetration depth and superconducting energy gap in very thin epitaxial NbN films (literal)
Abstract
  • We report the evolution of the magnetic penetration depth (?) and superconducting energy gap (?) in epitaxial NbN films with thickness (d) varying between 51-3 nm. With decrease in film thickness Tc and ?(0) monotonically decreases, whereas ?(0) monotonically increases. Our results show that while the values of ?(0) and ?(0) are well described by Bardeen-Cooper-Schrieffer theory, at elevated temperatures, films with d ? 6.5 nm show sudden drop in superfluid density associated with the Kosterlitz-Thouless-Berezinski transition. We discuss the implication of these results on the time response of superconducting bolometers made out of ultrathin NbN films. (literal)
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